<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.$store.state.city}}</div>
           </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
               v-for="item of hot"
               :key="item.id"
               @click="handleCityClick(item.name)"
               >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area"
           v-for="(item,key) of cities"
           :key="key"
           :ref="key"
           >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
               v-for="innerItem of item" :key="innerItem.id"
               @click="handleCityClick(innerItem.name)"
               >
                   {{innerItem.name}}
               </div>
        </div>
      </div>
   </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
export default{
  name: 'CitySearch',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  methods: {
    handleCityClick (city) {
      // 调用actions(没有异步操作可以省略)
      // this.$store.dispatch('changeCity', city)
      // 直接调用 Mutation
      this.$store.commit('changeCityMutation', city)
      // 页面跳转
      this.$router.push('/')
    }
  },
  // 侦听器
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper, { mouseWheel: true, click: true, tap: true })
  }
}
</script>

<style lang="stylus" scope>
  @import '~styles/varibles.styl'
    .border-topbottom
      &:before
        border-color: #ccc
      &:after
        border-color: #ccc
    .border-bottom
      &:before
        border-color: #ccc
    .list
      overflow: hidden
      position: absolute
      top: 1.58rem
      left: 0
      right: 0
      bottom: 0
      .title
        line-height: .54rem
        background: #eee
        padding-left: .2rem
        color: #666
        font-size: .26rem
      .button-list
        overflow: hidden
        padding: .1rem .6rem .1rem .1rem
        .button-wrapper
          float: left
          width: 33.33%
          .button
            margin: .1rem
            padding: .1rem 0
            text-align: center
            border: .02rem solid #ccc
            border-radius: .06rem
      .item-list
        .item
          line-height: .76rem
          padding-left: .2rem
</style>
